北国の遊び方　～北海道の釣りブログ～

トラウトフィッシングにおけるトゥイッチやジャークのリスク。

摂餌後に餌をかき集めるトラウト

In Salvelinus fontinalis, I identified two post-capture chewing behaviors: raking and open-mouth chewing. Generally, after taking the prey into the oral cavity, Salvelinus fontinalis raked several times followed by a series of repeated open-mouth chews.

引用：Kinematic analysis of a novel feeding mechanism in the brook trout Salvelinus fontinalis (Teleostei: Salmonidae): behavioral modulation of a functional novelty​Christopher P. J. Sanford

It is important to note that, when goldfish were drawn into the buccal cavity tail first, they were often expelled and turned around so that they could be swallowed head first.In some cases, a second series of rakes followed open-mouth chewing, although this was rare. Both raking and open-mouth chewing were present in almost all feeding bouts, irrespective of prey type.

引用：Kinematic analysis of a novel feeding mechanism in the brook trout Salvelinus fontinalis (Teleostei: Salmonidae): behavioral modulation of a functional novelty​Christopher P. J. Sanford

下あごから餌が離れる瞬間が一番危ない。

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